Ice-cream freezer.



PATBNTED MAY 28, 1907.

' P. TYsoN.

ICE CREAM FRBEZER.

APPLICATION FILED HAY 14, 1906,.

3 SHEETS-SHEET 1.

PATBNTEDMAY 28, 1907.

P. TYSON.

ICE CREAM PRBEZER.

APPLIOATION HLBD MAY 14. 190e.

3 SHEETS-SHEET 2.

w///////////i/////v//////// PATENTED MAY 28, 1907 F. TYSON. ICE CREAM PREEZER.

APPLIGATION Hmm In 14. 190e.

3 SHBETS-SHEBT 3.

l or base late for supporting the freezer and charge of the frozen cream that it Awill per- UNITED STATES PATENTl OFFICE.

FRANK Trsbofmiom OHIO. l

ICE-CREAM FREEZER.

Specication of Letters Patent.

Patented may 2e, 1907.

Application filed Hay 14, 1906, Serial No. 318,805.

To all 1071-0111, zf www' concern:

Be it known that I, FRANK TrsoN, a citizen of the United States, residing in Canton, Ohio, have invented certain Im rovements in Ice-Cream Freezers, of which t e following is a specification.

My invention relates to that class of icecream freezers whichare susceptible of being operated continuously, if desired, that is to say, the operation of the freezer does not have to be arrested for the supply of the cream thereto or the discharge of the frozen cream therefrom.

The objects of my invention are to render such a machine simple and efficient in its operation, to provide for the feeding of the cream to the freezing vessel and the discharge of the frozen cream from the same at one and the same end, to remove the frozen cream from the walls of the freezing vessel without the use of` a continuously acting scraper or Scrapers, and to so construct that element of the machine which effects the' disform such duty only when required, being at other times inoperative for such p ose.

In the accompanying drawings igure 1 is a longitudinal sectional view of an ice cream 'freezer constructed in accordance with my invention; Fi 2 is an end view of the same looking in t e direction of the arrow, Fig. 1; 3 is a transverse section, on the line a-a, ig. 1 Fig. 4 is a transverse section on the line b-b, Fig..1; Fig. 5 is a transverse section on the line c-c, Fiv'. 1; Fig. 6 is a lon` gitudinalsection illustrating one of the features of my invention; Fin'. 7 is a transverse section illustrating a modification of one of thefeatures of the invention, and Fig. 8 is 'an enlarged view showing one of the features of construction of the machine.

In the drawing, 1 represents a suitable bed the mec anism for driving the operative parts of the same. In the resent instance, the fixed structure of the flfeezer comprises opposite heads 2 and 3, which are connected by three metal cylinders 4, 5, and 6, the innermost cylinder 4- constituting the freezing vessel, the intermediate cylinder 5 inclosino the brine chamber 7 which surrounds sai freezing vessel, and the outer cylinder 6 inclosing an annular chamber 8 which vsurrounds the brine chamber and which may be packed with any suitable Anon-conducting the vesse material, or mav simplv constitute a dead air chamber, as preferre n The .brine chamber contains a spirally disposed flange 9`of a width equal tothe space etween the cylinders 4 and 5, this flan e being soldered or otherwise secured to eit er of the cylinders at appropriate' intervals, so that it occupies a fixed osition and serves to form a spiral passage or the brine around the freezing vessel, it being understood that the brine inlet this passa e an the Aoutlet pi site end o the same at 9'* in Fig. 1.

Rotating freely within a suitably packed bearing Within the head 2 of the machineis a tubular shaft 10, which is rotated by gearing from a transverse shaft 11, ada ted to suitable bearin'gs at the end of the ed or' baseplate 1, spirally toothed gearing being shown in the resent instance as a drivin connection. cured to and Vprojecting om the tubular shaft 10 is a sha t 1.2, which extends from end to end of the freezingvessel, and carries a series of beaters 12, the reduced end of this shaft 12 being'mounted in the hub I3 of a two-part disk 14-15, which can at the o poas shown y dotted in es rotate freely in a cup-shaped valve 16, the' latter being susceptible of turning .movement in the head 3 of the fixed structure of the machine for a purpose hereinafter described, and being retained in position longitudinall by means of cleats 33 secured to the he 3.

The machine is provided with a pair of combined rotary beaters and Scrapers, each consisti 17, four in the present' instance, carried by o po'site heads 18, the heads at one end of) the machine having pinions 19, which are `mounted so vas to rotate in a disk 20 nea-r one end of the freezing chamber, and the opposite heads having spindles 21 which can of a series o'f longitudinal blades (pipe is located at one eiid of turn in bearings in the inner portion 15 of the 4duplex disk 'at the opposite end of said The'disk 20 forms Ia snug fit with the inner surface of freezing chamber. reasonabl l1 4, so as to, prevent leakage of cream beyond the disk, and in the chamber between said disk 20 and the head 2 of the machine are contained the pinions 19 and a spur wheel 22, which is mounted upon the tubular' shaft 10, but is held-from rotation therewith by engagement with adpin 23 projecting inwardly from the hea 2, or by ITO some other equivalent retaining device. As a consequence of this construction the coinbincd beaters and scrapers 17 will not only be caused to rotate around the axis of the shaft 12 but will each be caused to rotate at a high rate of speed around its own axis, and instead of exerting a continugus scraping action upon the frozen cream adhering to the walls of'the freezing vessel 4, the blades 17 will act in rapid succession, the gearing being so devised that asthe Scrapers are carried around the axis of the shaft 12, the blades 17 will not act successively at the same points on the inner surface ofthe freezing vessel 4 but at points slightly in advance of, or slightly behind, those touched on the former rotation, whereby all portions of the inner surface of the freezing. vessel. will, within a ce'rtain number of rotations of the shaft 12, be acted u on by blades 17, and the removal of the fiozen cream from the entire inner surface of the freezing vessel will thus be effected, a longer time being afforded between successive actions of the scrapers upon any particular portion of the inner surface of the freezingvessel than if said scrapers were in continuous contact with said inner surface and therefore removed the frozen cream therefrom on each half rotation of the shaft 12. The rotating blades 17 of the Scrapers also act in the nature of beaters, and rovide for the more thorough agitation of t e cream than is ef fected by an ordinary scraper, the result being a smoother frozen product.

The rotating disk 20 has secured to it one end of each of a pair of blades 24, the opposite end .of each of these blades having a portion entering an opening -in the outer member 14 of the double disk at the delivergT end of the freezing chamber, but free from connection therewith, and hence capable of moving longitudinall in respect thereto, (see Fig. 8). Normal y these blades occupy a position parallel with the longitudinal axis of the shaft 12, as' shown by dotted lines in Fig. 1 and by full lines in Figs. 3 and 4, and hence exert nothing more than a stirring or agitating effect upon the mass of cream in the freezing chamber, the outer faces of the blades being, by reference, free from contact with the inner ace of the vessel 4, so that they will not act as Scrapers. By imparting a partial turn to the member 14 of the double disk these blades can be transformed from straight or parallel blades, such as shown in Fig. 1, into spirally disposed blades, such as shown in ig. 6, and they then have a tendency to move the frozen cream from the end 2 of the machine toward the end 3 of the same, or in other words, act as discharging blades for effecting delivery ofthe frozenc'ream from the freezing chamber. are not longitudinally confined to the disk The fact that the blades-24' 14 prevents 'the latter from exerting any restraint upon this change of position of the blades.

During the freezing operation the two members of the double disk 14 and 15 rotate together and with the shaft 12, a wheel 25, which is secured to the hub of thedisk -member 14, being locked by means of a spring bolt 26 to an armv 27, which is secured to the reduced end of the shaft 12, as shown in Fig. 1, but if the bolt 26 is temporarily withdrawn from engagement with the wheel 25 and the latter wheel is held against rotation until the arm 27 has made a partial turn, and the spring bolt 26 has entered another opening 28 in said wheel, there will be movement of the disk 20 relatively to the outer member 14 of the double disk and a consequent shift of the blades 24 from the osition shown in Fig. 1 to that shown in 1g. 6, reverse movement of thewheel '25 in' respect to the arm 27 effecting a restoration of the blades 24 to their normal-position.

The head 3 of the machine has a port 30 for the introduction of the cream into the freezing chamber, and a port 31 for the discharge of the frozen cream therefrom, and thel cup-shaped valve 14 has a port 32, as shown in Figs. 1, 3 and 6, or it may, if desired, have two of these ports.

When the valve is in the position shown in Figs. land 3 both lof the ports 3() and 31 are closed, this being the position of the valve when the freezing op eration is being conducted Within the freezing chamber. By the valve in the direction of the arrow 3) however, the port 32 of the valve ma be brought into register with the port 31 ofy the head 3, as shown in Fig. 6, in order to permit discharge of the frozen cream from the freezing chamber, and by turning said valve in the direction of the arrow y, (Fig. 3) the port 32 may be brought into register With the port 30, for the purpose of permitting introducfc, (Fig.

tion of a fresh supply of cream into the freezing cham-ber. When two ports are used they should be so disposed that both of them cannot be open at the same time.

In the modification of my invention shown in Fig. 7, the shaft 12 has oppositely rojecting arms 34, in the outer ends of wl? mounted "rock shafts 35, each carrying a scraping blade 36, and' each having an arm 37, one of these being connected by a rod 38 to one arm, and the other to`the opposite arm of a two-armed lever 39, mounted so as to be f Tee to rock ori the shaft 12. The blades 36 are thus connected for simultaneous and corresponding 'movement, and the weight of the cream upon the blade which,V for the time being, occupies the lower portion ofthe vessel 4, tends not only to press said blade against the inner face of the vessel 4, but also imparts like movement to the upper blade, and thus causes a scraping action turning ich are .lindrical freezing vessel, an ejector plateas rovided with two ejector lades 24, and

lWhile I prefer this construction, it will be evident that a single blade could be used, if desired, or more than two blades might be emplo ed, and it is'also immaterial to the 4broa( er embodiment of my invention whether the beati and stirring devices or the freezing vessel e the element which rotates about the axis of the shaft 12, the rotation of the beating and stirring devices, however, being the preferable construction.

I claim 1. A rotary horizontalice cream freezer, having, at the same en'd, inlet and outlet, both opening directly into the freezing chamber, a valve controlling said outlet, and means located at the said end for operating said valve whereby the condition of the contents of the latter mayv be observed through said inlet opening and the cream supply and delivery of frozen cream controlled by the operator at the said end of the machine with- `out changing his position.

2. A rotary ice cream freezer having both inlet and discharge ports at the same end, and a singlevalve controlling both of said ports.

3. A rotary ice cream freezer having both inlet and discharge ports at the same end, and a single valve having but one port and controlling both the inlet and discharge ports of the freezer.

4. A rotary ice cream freezer comprisi a cylindrical free vessel with inlet andriigischarge ports at t e same end, and a valve closi said -end of the freezing vessel and contro ling said inlet and discharge ports.

5. A rotary ice cream freezer having a c lindrical freezing vessel, and a blade therein adjustable either into 'line with the axis of the vessel or to a spiral position, so as to serve as an ejector.

6. A rotary ice cream freezer having a cytherein, and means'for imparti to one end of said plate a partial turn aroum the axis of the freezing vessel without ,corresponding movement of the other end of the plate.

7. A rotary ice cream freezer having a cylindrical freezing vessel an ejector blade therein, xedly mounted at one end and a carrier engaging the other end of said blade, and mounts( so as to be susceptible of a partirl'turn around the axis of the freezing vesse 8. A rotary ice cream freezer having a cylindrical freezing vessel, an ejector blade therein fixedly mounted at one ehd, and a carrier loosely engaging the other end of said blade, and mounted so as to be susceptible of a partial turn around the` axis of the freezing vessel.

9. A rotary ice cream freezer com rising a cylindrical vessel with inlet and isehargc ports at one end, a controlling valve for said ports fitting said end of the freezing vessel, a carrier mount-ed so as to be susceptible of a artial turn in said valve, and an ejector lilade engaging said carrier.

10. A rotary ice cream freezer having a ey'- lindrical freezing vessel, an ejector blade therein free to move at one end independenty of the other end, and a carrier-.engaging said independently movable end of the blade and having an axial extension ro'ecting to the. outside of the freezing vesse wliereby it 'may be turned.

11. A rotary ice cream freezer having oppositely disposed and movably mounted Scrapers, and means connecting a movable portion of one sera er to a. corresponding movable portion of t e other scraper, whereby movement of one scraper independently of the other is revented, and joint, simultaneous and simi ar action of the Scrapers is effected.

12. A rotary ice cream freezer having a cylindrical freezing vessel, a central shaft having projecting beater arms, set dia onally in respect to the axial line of the sha t, a combined beater and scraper mounted adjacent to the inner wall of the freezin vessel, and means for rotating the central s aft and the combined beater and scraper indeendently but in the same direction about t e axis of the freezing vessel.

13. A rotary ice cream freezer having a cylindrical freezm vessel, a central shaft .havin projecting eater arms disposed diagona l in res ect to the axial line of the shaft, a com ined eater and scra er mounted adjacentto the inner wall of t e freezing vessel, means for rotating the central shaft and the combined beater and scraper inde endently but in the same direction about. tiie axis of the freezing vessel, and means for rotating said combined beater and scraper about its own axis independently of. its rotation about the common axis.

14. A horizontal ice cream freezer having a stationary freezing vessel, and rotating scraping and agitating mechanism therein,

said freezing vessel havug inlet and dischar e openings at the same en communicating irectly with the freezing chamber, a valve controlling said outlet and means located at said end of the machine for operating the said valve, whereby the condition of the contents ofthe chamber maybe observed through said inlet opening and the cream supply and IIO delivery of the frozen cream controlled by the o erator at said end of the machine without c ianging his position.

l5. A rotary ice cream freezer' comprising a cylindrical freezing vessel, a rotar beater and scraper mounted adjacent to the inner wall of said vessel, an ejector blade, and a twoart disk, one'part providing a bearing for tlie beater and scraper and the other for the ejector blade, said two parts of the disk being mounted so as to have movement relatively to one another.

16. A rotary horizont-al ice cream freezer having both inlet and discharge openings at the same end communicating directly with the freezing chamber, said discharge opening delivering 1n a substantially vertical direction, a valve controllingr said outlet and means located at said end of the machine. for operatin the said valve, whereby the condition of' t e contents of the chamber may be observed through said inlet opening and the cream supply anddelivery of the frozen cream controlled by the operator at said end lindrical freezing vessel, an ejector blade therein., a carrier for one end of said blade mounted so as to be susceptible of a partial turn around the axis of the freezer, external devices whereby the adjustment of said carrier can be effected, and means for locking said devices in either position of adjustment. In testimony whereof. I have slgned my name to this specification, in the presence of two subscribing Witnesses.

FRANK TYSON.

Witnesses: Y

ISAAC H. TAYLOR, Z. W. Davis.4

1r is hereby certified that in Letters Patent No. $55,364. granted May 28, 19m,

lupon the application of Franlf Tyson, of Canton, Ohio, for an improvement in Ice-Cream Freezers an error a ars in the rinted s eicaton re uirn cor recton es follows: Page 3, line 26, citer the word valve insert a. semicolon;

and that the said Letters Patent should be read with this correction therein 'that the same may conform to the record of the case in the Patent Ofiice.

4Signed and sealed this 12th day of January, A. D., 1915.

[mn] R. F. WHITEHEAD,

Acting Commissioner' of Patents. 

